Allegory versus archetype

Allegory: a narrative that serves as an extended metaphor. Allegories are written in the form of fables, parables, poems, stories, and almost any other style or genre. The main purpose of an allegory is to tell a story that has characters, a setting, as well as other types of symbols, that have both literal and figurative meanings. The difference between an allegory and a symbol is that an allegory is a complete narrative that conveys abstract ideas to get a point across, while a symbol is a representation of an idea or concept that can have a different meaning throughout a literary work (A Handbook to Literature).

 Archetype: A symbol, usually an image, which recurs often enough in literature to be recognizable as an element of one's literary experience as a whole. Carl Jung used the term "archetype" to refer to the generalized patterns of images that form the world of human representations in recurrent motifs, passing through the history of all culture. http://theliterarylink.com/definitions.html